应用金属夹缝合胃壁全层缺损的动物实验

目的探讨应用金属夹缝合胃全层缺损的可行性、安全性和有效性。方法48只新西兰大白兔按随机数字表法分为4组,每组12只。在胃体部全层切开直径2cm的缺损后,第1组不缝合胃壁缺损．第2组用金属夹夹闭胃壁黏膜层．第3组用金属夹夹闭胃壁全层,第4组用3-0丝线缝合胃壁全层。分别于术后第3天和第7天处死各组动物,大体观察创面愈合情况;测定创面爆破压;并取创面组织,行苏木精-伊红染色和Masson染色,评价创面炎性反应及组织纤维增生情况。结果第1组动物术后34h内全部死亡,其他各组动物均良好存活．所有存活动物无腹腔内出血和感染表现。第2、3组与第4组相比,手术耗时短（45．8±1．6）min和（42．5±1．5）min比（48．0±1．4）min,P〈0．05];第3天创面爆破压低]（36．9±4．6）mmHg和（39．8±4．1）mmHg比（50．5±4．2）mmHg,P〈0．05];第7天创面爆破压3组间差异无统计尝意义（95．0±7．9）mmHg、（97．8±6．8）mmHg和（98．5±7．0）mmHg,P〉0．05]。相同时间点创面苏木精．伊红染色显示金属夹缝合组炎性反应较轻,Masson染色反映创面愈合无明显差别。结论应用金属夹缝合胃部全层缺损,无论夹闭胃黏膜层或全层组织,均能达到与手术缝线缝合相同的临床愈合效果和质量。

A pilot study of closure of gastric full-thickness defect with metallic clips in a rabbit model

Objective To evaluate the feasibility, efficacy, and safety of metallic clips for closure of full-thickness defects in the stomach wall. Methods Forty-eight rabbits were randomly divided into 4 groups with 12 in each group using random digits table. A 2 cm×2 cm full-thickness defect was created in the gastric body. No closure was performed in the first group; in the second group, mucosa closure with metallic clips; the third group, closure of full-thickness gastric tissue with metallic clip; the fourth group closure with 3-0 silk suture. After operation the animals were sacrificed at the third day and the seventh day. Wound healing was evaluated. Bursting pressure was recorded. HE and Masson staining was performed to inspect wound inflammation and tissue fibrosis situation. Results After operation all the animals in the first group died within 34 hours, while those in other groups survived. No intraperitoneal bleeding or infection were seen in the survived animals. General observation showed that the metallic closure group caused less intraperitoneal adhesions. Operative time was shorter in the second and third group compared to the fourth group （45.8±1.6） min and （42.5±1.5） min vs. （48.0±1.4） min, P〈0.05]. The bursting pressure on the third day was lower （36.9±4.6） mm Hg and （39.8±4.1） mm Hg vs. （50.5±4.2） mm Hg, P〈0.05]. There was no significant difference in bursting pressure on the 7th day among the three groups （95.0±7.9） mm Hg and （97.8±6.8） mm Hg vs. （98.5±7.0） mm Hg, P〉0.05]. HE staining revealed that metal closure had a better healing and Masson staining reflected no significant difference in healing at the same time point. ConclusionsMetal clips closure full-thickness defects in the stomach, regardless in full thickness or mucosa closure, is as safe and effective as suture closure.